Product description
"Anti Pest Ball” consists of a lightweight ball that rests at bottom of the device over an opening. When water flows into the floor/gully trap, the "Anti Pest Ball” floats allowing water to flow through. When no water flows, the "Anti Pest Ball” rests at the bottom of the device, thus preventing foul smell, insect breeding at the water seal.
If you have protruding pipes, this will not fit(see other images) . You will have to hire a handyman to saw the excess piece away
Top Diameter: 9.7cm (Opening Diameter of Drain must be at least 8.8~8.9cm for product to fit)
Height: Approx 12cm (Drain must be clear for at least 15cm down with no obstructions(like protruding pipes)
Item Will Not Fit AfterMarket Trapholes(from China etc) as they are not the intended HDB standard size